Hardening behavior of a hydro collapsible loessial soil

Haeri, S. M; Garakani, A. A Association for Disaster Prevention Research; et al.; Fukuoka Convention and Visitors Bureau; Japan Society for the Promotion of Science - Grant-in-Aid for Publication of Scientific Research Results; Kyushu Regional Planning Association; The Maeda Engineering Foundation Sharif University of Technology

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Hardening behavior of a hydro collapsible loessial soil

Haeri, S. M ; Sharif University of Technology | 2015

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Type of Document: Article
DOI: 10.3208/jgssp.IRN-02
Publisher: Asian Regional Conference on Soil Mechanics and Geotechnical Engineering , 2015
Abstract:
Hydro collapsible soils are of kinds of problematic soils which show high shear strength at low degrees of saturation but due to wetting, their Meta stable structure collapses and will be subjected to large deformation. In this study by applying isotropic triaxial loadings to undisturbed samples, mechanical behavior of a highly collapsible loessial soil has been assessed. During tests, matric suction of the samples was controlled as well as the mean net stress, and the variation of the degree of saturation was monitored continuously. Two types of stress paths were conducted on the samples namely "Isotropic induced collapse" under applying constant matric suctions and "wetting induced collapse" by decreasing matric suction while applying constant mean net stress. Results show increasing yielding stress of the samples by increasing the mean stress under constant matric suctions. By considering effective stress approach, a hardening model is introduced in this paper to interpret the behavior of the tested soil. Agreement obtained between the predicted and measured values of the yielding stresses during tests is promising and shows the efficiency of the presented model
Keywords:
Triaxial test ; Unsaturated collapsible loess ; Geotechnical engineering ; Hardening ; Soil mechanics ; Soils ; Wetting ; Collapsible loess ; Collapsible soil ; Degree of saturations ; Effective stress ; Hardening behavior ; Hardening model ; Mechanical behavior ; Undisturbed sample ; Shear strength
Source: 15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015, 9 November 2015 through 13 November 2015 ; September , 2015 , Pages 253-257
URL: https://www.jstage.jst.go.jp/article/jgssp/2/4/2_IRN-02/_article

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